What Is a Walk-in Salt Spray Test Chamber and How Is It Done?

Salt spray corrosion is one of the most persistent challenges faced by automotive, aerospace, electronics, and metal manufacturing industries. As product structures become larger and more complex, traditional benchtop corrosion chambers can no longer accommodate full-size components or complete assemblies. This drives the adoption of Walk-in Salt Spray Test Chambers-large-capacity, precision-controlled corrosion environments engineered for oversized specimens and high-volume testing needs.

LIB Walk-in Salt Spray Test Chamber by LIB encapsulates the full advantages of high-uniformity fog distribution, strict adherence to global standards, and modular construction suitable for laboratories, factories, R&D centers, and third-party testing institutions. Built to comply with internationally recognized specifications including ISO 9227,ASTM B117,ASTM G85,JIS Z 2371,SAE J2334,Ford CETP,VW PV1210,GM 9540P,ISO 9223,UL 199,UL 852,ISO 4524,ASTM B604,IEC 60068,IEC 61701, it delivers accurate, repeatable, and stable long-duration corrosion evaluations for almost every industrial sector.

1. Overview of the Walk-in Salt Spray Test Chamber

Salt spray test chambers were developed to meet the urgent need for accelerated corrosion evaluation in industrial environments. As metal components, coatings, and electronic assemblies are increasingly exposed to harsh marine climates, road salt, chemical pollutants, and humidity, manufacturers needed a controlled and repeatable way to simulate these aggressive conditions. The salt spray chamber recreates a high-salt, high-humidity atmosphere to predict long-term corrosion performance within days or weeks, helping industries improve material selection, protective coatings, and product reliability.

A Walk-in Salt Spray Test Chamber is a corrosion-simulation system designed for oversized or multiple samples. Unlike traditional chambers with limited capacity, walk-in structures offer room-sized interiors such as 3000×2500×2200 mm or custom dimensions on request. They enable direct placement of automotive bodies, metal cabinets, aerospace panels, or bulk-coated materials without disassembly.

LIB's chamber features a full 316 stainless steel interior, seamless welding, and strong structural panels that resist corrosion, salt crystallization, and long-term moisture exposure. A precision-made quartz spray nozzle produces consistently atomized saline fog, while the saturated air barrel ensures stable humidity and temperature before fog enters the room. The chamber supports continuous or cyclic testing modes according to ISO 9227 and ASTM G85, with a temperature range typically between +10°C to +90°C.

In addition, the walk-in chamber features an advanced monitoring and control system that maintains stable operation during long tests lasting hundreds or even thousands of hours. The touchscreen controller tracks temperature, humidity, spray volume, and run-time data, enabling real-time adjustments and optional remote supervision. Safety protections-including over-temperature control, low-water alarms, automatic water refill, and regulated air supply-ensure reliable performance under continuous or cyclic testing. These functions make the chamber ideal for research labs, automotive corrosion centers, and production-line quality inspection where high consistency and repeatability are essential.

2. Operating Method of the Walk-in Salt Spray Test Chamber

Salt spray testing relies on creating a controlled fog of atomized salt solution. In LIB's Walk-in chamber, the operational method is built around accuracy, repeatability, and compliance with international testing procedures.

First, the operator prepares a 5% NaCl saline solution, adjusting the pH to 6.5–7.2 for NSS or 3.1–3.3 for AASS and CASS modes. The stirred saltwater tank prevents sedimentation to ensure uniform concentration. Next, samples are positioned at an angle of 20°–30°, preventing condensation droplets from influencing results. Once the test parameters are set on the PID touchscreen controller, the system automatically manages temperature, humidity, spray pressure, and deposition rate.

During operation, the saturated air barrel preheats compressed air to achieve stable humidity before entering the spray nozzle. Uniform fog distribution is maintained at approximately 83 kPa pressure, producing deposition between 1–2 mL per 80 cm² per hour, conforming to ISO 9227 and ASTM B117. The chamber's PT-100 Class A temperature sensor provides 0.001°C resolution, ensuring ±0.5°C fluctuation and ±2°C deviation. Fog collectors monitor actual deposition to verify consistency throughout extended testing cycles ranging from 24 to 1000 hours or more.

》》》For more technical information and details about our UV Weathering Test Machine, please feel free to email us at info@libtestchamber.com.

3. Applications and Highlights of the LIB Walk-in Salt Spray Test Chamber

Applications

LIB Walk-in Salt Spray Chambers are used across multiple industries for evaluating:

• Automotive components: body frames, subframes, chassis systems, exhaust systems
• Aerospace structures: fuselage sections, coated aluminum panels
• Energy storage systems: battery housings, metal cabinets, enclosures
• Marine hardware: stainless steel parts, galvanized materials
• Construction and architecture: decorative coatings, outdoor fixtures
• Electronics: connectors, terminals, protective housings

The chamber supports NSS,AASS,CASS and cyclic G85 tests, making it suitable for anti-corrosion coatings, electroplating, painting systems, and surface treatment durability evaluations.

Key highlights of LIB Walk-in Salt Spray Chambers include:

Large capacity with customizable dimensions: Large-capacity chambers with fully customizable dimensions, allowing direct placement of oversized test pieces such as vehicle bodies, metal cabinets, and aerospace panels.

A precision salt spray system including quartz nozzle, spray tower, and salt collector that delivers stable, fine, and uniform saline fog to ensure consistent exposure across every testing zone.

Programmable PID control supporting multi-step cyclic profiles, continuous operation, data recording, and optional remote monitoring for long-duration tests.

A 316 stainless steel workroom with seamless welding that provides exceptional corrosion resistance, prevents salt crystallization buildup, and extends chamber lifespan.

A comprehensive safety system featuring over-temperature protection, low-water and low-pressure alarms, leakage detection, and automatic refill for uninterrupted testing.

Energy-efficient refrigeration and heating enabling rapid stabilization.

High-Accuracy Concentration Stirred Saltwater Tank: High-accuracy stirred saltwater tank maintains 5±1% NaCl concentration and pH 6.5–7.2 with built-in brine mixing system for reliable ASTM B117 compliance.

Smooth installation and maintenance with modular panel design.

These features ensure consistent performance, accurate test results, and reliability over years of intensive operation.

》》》To receive customized solutions and pricing for the UV Weathering Test Machine, please contact us at info@libtestchamber.com.

4. Installation, Customization, and Transportation Services

LIB provides complete global installation services designed for different facility structures. Chambers are available in two construction types:

Non-disassembled Walk-in Chambers

Delivered as a complete structure, ideal for facilities with wide access and heavy load-bearing floors. Offers maximum robustness and faster commissioning.

Fully Disassembled or Modular Walk-in Chambers

Delivered in sectional panels for assembly on-site. Suitable for laboratories with narrow entrances, multi-floor installations, or confined spaces.

Step 1: Define Chamber Dimensions
Confirm required chamber size, internal shape, door type, and usable test volume based on sample size and room layout.

Step 2: Determine Temperature & Cycle Requirements
Set working temperature range, heating/cooling rate, salt spray or cyclic corrosion modes, and any special cycle durations.

Step 3: Configure Spray & Collection System
Choose spray tower position, fog distribution method, and collector layout to ensure uniform fog coverage and compliance with test standards.

Base Support                                                                    Base Panel                                             Wall Panel

                                                                                                            Cleaning                                                             Top Panel

Step 4: Specify Floor Structure & Load Capacity
Define floor reinforcement, anti-corrosion treatment, load-bearing capacity, and ramp or threshold design if heavy samples are used.

Step 5: Integrate Data & Control Interfaces

Add user-required data-acquisition systems, communication ports, monitoring software, and external control compatibility.

Customization services include:

• Chamber size, shape, and door type
• Temperature and cycle configurations
• Spray tower position and collector layout
• Floor structure and load capacity
• Integration with user data-acquisition systems

Transportation is carried out using reinforced crates and anti-corrosion packaging. After arrival, LIB technicians handle equipment positioning, assembly, calibration, and operator training. All chambers support 7–15 days fast delivery and include a 3-year warranty, lifetime technical support, and rapid spare-parts service.

For professional guidance, customized designs, and quotations for Walk-in Salt Spray Test Chambers, please contact LIB Industry.